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Cereal Research Communications

, Volume 45, Issue 2, pp 225–233 | Cite as

Enhanced Light Intensity Increases Flavonol and Anthocyanin Concentrations but Reduces Flavone Levels in the Cotyledons of Common Buckwheat Seedlings

  • H. Dębski
  • W. Wiczkowski
  • D. Szawara-Nowak
  • N. Bączek
  • M. Szwed
  • M. HorbowiczEmail author
Article

Abstract

The effects of two light intensities on the concentration of several flavonoids were investigated in the cotyledons of common buckwheat seedlings. The study was performed on four days old seedlings of cvs. Hruszowska, Panda, Kora and Red Corolla. One group of seedlings was grown under exposure to 180 ± 20 μmol · m−2 · s−1 photosynthetically active radiation, whereas the other group was exposed to 360 ± 20 μmol · m−2 · s−1. The experiment lasted 5 days. The results revealed that light intensity induces changes in the levels of flavonols and flavones. Increased light intensity contributed to a decrease in the concentrations of all flavone C-glucosides: orientin (luteolin-8-C-glucoside) and iso-orientin (luteolin-6-C-glucoside), and apigenin: vitexin (apigenin-8-C-glucoside) and iso-vitexin (apigenin-6-C-glucoside). Simultaneously, a substantial increase in the content of flavonols, i.e. quercetin O-glycosides, was found. To the best of our knowledge, this is the first evidence to demonstrate the contrary responses of plant flavonols and flavones to light intensity. The content of anthocyanin also increased under exposure to higher light intensity. Our results indicate that quercetin O-glycosides can play a similar role to anthocyanins in the cotyledons of common buckwheat seedlings. Results of correlation analysis indicate that the increase in flavonol and anthocyanin concentrations in response to higher light intensity is maintained through reduced accumulation of flavones and proanthocyanidins.

Keywords

common buckwheat seedling light intensity flavonoids 

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Enhanced Light Intensity Increases Flavonol and Anthocyanin Concentrations but Reduces Flavone Levels in the Cotyledons of Common Buckwheat Seedlings

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Copyright information

© Akadémiai Kiadó, Budapest 2017

Authors and Affiliations

  • H. Dębski
    • 1
  • W. Wiczkowski
    • 2
  • D. Szawara-Nowak
    • 2
  • N. Bączek
    • 2
  • M. Szwed
    • 1
  • M. Horbowicz
    • 1
    Email author
  1. 1.Department of Plant Physiology and Genetics, Faculty of Natural SciencesSiedlce University of Natural Sciences and HumanitiesSiedlcePoland
  2. 2.Department of Chemistry and Biodynamics of FoodInstitute of Animal Reproduction and Food Research of Polish Academy of SciencesOlsztynPoland

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